DSA-3853-1 bitlbee -- security update

It was discovered that bitlbee, an IRC to other chat networks gateway,
contained issues that allowed a remote attacker to cause a denial of
service (via application crash), or potentially execute arbitrary
commands.

For the stable distribution (jessie), these problems have been fixed in
version 3.2.2-2+deb8u1.

For the upcoming stable (stretch) and unstable (sid) distributions,
these problems have been fixed in version 3.5-1.